diff --git a/lib/helpers/toFormData.js b/lib/helpers/toFormData.js
index 6dcb9d2337..7eb9465e00 100644
--- a/lib/helpers/toFormData.js
+++ b/lib/helpers/toFormData.js
@@ -118,7 +118,7 @@ function toFormData(obj, formData, options) {
         key = removeBrackets(key);
 
         arr.forEach(function each(el, index) {
-          !utils.isUndefined(el) && formData.append(
+          !(utils.isUndefined(el) || el === null) && formData.append(
             // eslint-disable-next-line no-nested-ternary
             indexes === true ? renderKey([key], index, dots) : (indexes === null ? key : key + '[]'),
             convertValue(el)
@@ -155,7 +155,7 @@ function toFormData(obj, formData, options) {
     stack.push(value);
 
     utils.forEach(value, function each(el, key) {
-      var result = !utils.isUndefined(el) && visitor.call(
+      var result = !(utils.isUndefined(el) || el === null) && visitor.call(
         formData, el, utils.isString(key) ? key.trim() : key, path, exposedHelpers
       );
 
diff --git a/test/specs/helpers/buildURL.spec.js b/test/specs/helpers/buildURL.spec.js
index 6ddba8f009..fd55dcce4c 100644
--- a/test/specs/helpers/buildURL.spec.js
+++ b/test/specs/helpers/buildURL.spec.js
@@ -7,9 +7,13 @@ describe('helpers::buildURL', function () {
   });
 
   it('should support params', function () {
-    expect(buildURL('/foo', {
-      foo: 'bar'
-    })).toEqual('/foo?foo=bar');
+    expect(
+      buildURL("/foo", {
+        foo: "bar",
+        isUndefined: undefined,
+        isNull: null,
+      })
+    ).toEqual("/foo?foo=bar");
   });
 
   it('should support object params', function () {
@@ -29,9 +33,11 @@ describe('helpers::buildURL', function () {
   });
 
   it('should support array params', function () {
-    expect(buildURL('/foo', {
-      foo: ['bar', 'baz']
-    })).toEqual('/foo?foo[]=bar&foo[]=baz');
+    expect(
+      buildURL("/foo", {
+        foo: ["bar", "baz", null, undefined],
+      })
+    ).toEqual("/foo?foo[]=bar&foo[]=baz");
   });
 
   it('should support special char params', function () {